That's not possible,right? I always use an external application to zoom and pan. Would be nice to view frames and sequences(!) with different zoom-factors inside the rrviewer. I think its not currently possible because all previews uses small jpegs to make preview-images fast. Thats clever and much appreciated. But anyway, the additional ability to zoom-in and pan could be a nice feature. Maybe with a second jpeg sequence, created the same way as the standard preview but just for detailed control of the rendered frames.

It would be possible to zoom and pan in the full size viewer, but these high-res images cannot be cached.
I will add a request for custom zoom in the fullsize-viewer._________________Holger SchÃ¶nberger
Binary Alchemy - digital materialization